Johnson & Johnson’s Vaccine Offers Strong Protection but Fuels Concern About Variants

By Carl Zimmer, Noah Weiland and Sharon LaFraniere from NYT Health https://ift.tt/3thE4U2 The vaccine’s efficacy rate dropped from 72 percent in the United States to just 57 percent in South Africa, where a highly contagious variant is driving most cases. https://ift.tt/3thE4U2